Monitoring the use of alcohol in traffic : first results of the regional monitoring networks in the Netherlands. Currently, data on road crash casualties provide local authorities with insufficient starting points for their road safety policy. The regional road safety bodies of the Dutch provinces of Gelderland (ROVG, currently the ROV Eastern Netherlands), Fryslân (ROF) and Zeeland (ROVZ) and the province of Utrecht have therefore asked SWOV to join them in monitoring a number of alternative indicators. In literature these alternative indicators are known as ‘safety performance indicators’ abbreviated as SPIs. SPIs are indicators for risk factors that exhibit a strong causal relationship with road safety. Use of such indicators in policy ties in with a number of current developments, among which the instrument of provinces to proactively measure and prioritize road safety (ProMeV). Starting point for the monitoring pilot was to begin the study with a limited set of indicators for risk factors that were on the ‘wish list’ of the abovementioned provinces and that also meet the definition of an SPI. This yielded indicators for a) drink-driving, b) speed, c) quality of road infrastructure, and d) bicycle safety risks. This report discusses the experiences in creating a decentralized drink-driving monitoring network. These experiences are based on SWOV recommendations (Houwing & Aarts, 2013). In the province of Zeeland, a decentralized drink-driving monitoring network has existed since 2003. Recently, the province of Fryslân also started a pilot with a drink-driving monitoring network, and the ROV Eastern Netherlands and the police unit Eastern Netherlands will also embark on a pilot. This report discusses the experiences gained from the pilot with the Fryslân drink-driving monitoring network and compares these with the recommendations that have been made as well as with the existing Zeeland drink-driving monitoring network. The Fryslân pilot will yield much information that can be used for further measurements within a decentralized drink-driving monitoring network. The most important considerations are: a) to ensure a sample that is sufficiently large, and b) to ensure the correct distribution of the measurements over time and place in order to get a representative sample which is comparable to that of previous years. These considerations are used as a basis for, a number of recommendations for setting up a decentralized drink-driving monitoring network in other regions, such as possibilities for the organization, timing and data collection.
Samenvatting